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description: Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado
items: problem:symbol not be showed in IdlgrPlot object etc.
items: Re: problem:symbol not be showed in IdlgrPlot object etc.

problem:symbol not be showed in IdlgrPlot object etc.
type: item
description: Hello,I have draw the background map.Thanks for Mr.Rick Towler and Mr.Mark Hadfield a lot. But I met some difficulties when I try something else,so could you give me some adivce please. 1, I want to draw some cities above the background map,but the symbols can not be showed. I use the code as follows: ;----------------------------------------------------- ;draw cities cityUV = map_proj_forward(lon, lat, $ map=map_info.smap $ ) ;define the symbol pentagon=OBJ_NEW('IDLgrPolygon', [0.1,0.5,0.9,0.7,0.3], $ [0.6,0.9,0.6,0.1,0.1], $ COLOR=Color_cities $ ) symModel = OBJ_NEW('IDLgrModel') symModel -> Add, pentagon symModel -> Scale, 8, 8, 1 symModel -> Translate, -1, -1, 0 ocitiesSymbol = OBJ_NEW('IDLgrSymbol', symModel) ; ocitiesSymbol=OBJ_NEW('IDLgrSymbol',4,$ ; color=Color_NoData,$ ; thick=8.0,$ ; size=[9.0,9.0]$ ; ) map_info.ocitiesSymbol=ocitiesSymbol oPlotCities=OBJ_NEW('IDLgrPlot',cityUV[0,*],cityUV[1,*], $ Symbol=ocitiesSymbol,$ _Extra=extra,$ ;Thick=2 ,$ LINESTYLE =6 $ ) map_info.omodel->ADD,oPlotCities map_info.owindow->DRAW,map_info.oview,/draw_instance ;-------------------------------------------------------- If I change the LINESTYLE value from 6 to 3,The lines has been showed,but the Symbols also can not be showed . 2,I use the develop model of C# plus axIDLWidgetControl 3.0,I write the mouse event in C#,so I must obtain the value of IDL's variable from IDL's .pro file.But I can not get them .The code is as follows: IDL's code //////////////////////////////////////////////////////////// /////////// PRO MouseMove,drawid,x,y common lonlat_mousemovex,lonlat_mousemovey widget_control,drawid,get_uvalue=map_info,/no_copy if size(map_info, /type) eq 0 then return result = map_info.owindow -> pickdata(map_info.oview, $ map_info.omodel,$ [x,y], xy) lonlat_mousemove = map_proj_inverse(xy, map = map_info.smap) map_info.lonlat_mousemovex=lonlat_mousemove[0] map_info.lonlat_mousemovey=lonlat_mousemove[1] widget_control,drawid,set_uvalue=map_info,/no_copy END C# 's code //…
creator: shengbaojun
date: 2005-10-27T02:35:50-00:00

Re: problem:symbol not be showed in IdlgrPlot object etc.
type: item
description: shengbaojun wrote: <sigh> > The Second, VB、VC etc. must use axIDLDrawWidget1.DrawID as draw > id;But,C# can use IDLDrawWidget1 as draw id directly,I have filfulled > it.The world map can be draw corretly. Are you sure? You are drawing the map, but maybe you're just lucky. I don't know why you wouldn't pass the DrawID property even if it does work without it? It's confusing. Have you even tried passing the draw ID in the method I suggested? I find it hard to believe that the AX control behaves so differently in C#. For instance, why, in C#, would the control parse the command you send via ExecuteStr to pull out the string "IDLDrawWidget1" and use that to get a reference to the draw widget when in the VB and VC case you need to pass the draw ID as a long value which represents the drawID converted to a string? I'm not saying it can't work in this way, but I would be surprised. Surprised enough that if something wasn't working that I would try a different approach. *Maybe one similar to the examples shipped with IDL and suggestions posted to the news group* And in the end, if they both work the same at least your code would be a little more understandable. > My quesion is: > 1. I have filfull the background map drawing,using the IDLgrPolyLine > and the data source is *.shp,I want to overlay some symbols to this > background map,the polylines can be drawn,but the symbols can't be > drawn. Did you try applying any of the changes I suggested? Especially the changes to the transformations to your symbols? Asking the same question again without telling us what you have tried is not productive. > 2. Are there a good method to get variable value from IDL 's Object > program model in C# environment.And now ,I use SetOutputWnd but not > GetNamedData. As we have said before, I suggest that you attack this problem in two steps. Get the IDL code working in IDL as a first step, then work on the C# side of things. *S-I-M-P-L-I-F-Y* -Rick
creator: Rick Towler
date: 2005-10-31T19:03:00-00:00